When expanding ones research to search for toponyms, that either are spelled the same as or at least similar to the family name ZWIR T Z or that sound similar, which could give a hint of the family‘s origin, then one will find the following village or town names:

In Thuringia, located not far from the city of Seelingstädt , there is a small settlement, which was first mentioned in documents in 1209, a row village, with name Zwirtzschen , carrying this name with this diction since approximately 1590.

Further, close to the town of Niederseidewitz in the county of the Sächsische Schweiz, one can find a hamlet with name Zwirtzschkau comprising two country estates; first time mentioned in documents in 1338 and latest since 1875 bearing the name with this diction.